I would be a big fan of a Sullivan hire compared to what else is out there. The issue is prying him away from PIT. The core group there loves him. Dubas may think differently too though with how mid they were and may want to flex his GM muscles. Getting a cup winner behind the bench would do our group well, but I'm meh on Berube or any recently fired coaches really.
Boudreau would be interesting one who I think could motivate well, but it seems like when his teams go bad, they really go bad and his later time in VAN left a bad taste I think. Scott Stevens would be one out of the blue hire I'd be excited for if he ever were to want the job, but I think that would be a longshot darkhorse as I'm pretty sure he'd said he's happy where he's at recently or in the past.
Brind'Amor isn't going anywhere if the Canes can pound the NYR in 5, but if he or Cooper somehow become available, I think you have to at least shoot your shot with them. I don't see Cooper moving on unless they really start playing like sh!t.